Effect: "Jams" like Red Rust if Alucard's total ATT is 10 or less, slow swing speed if total ATT is 29 or less, Slash Flurry and increase swing speed if ATT is 30 or more; Continuous Dark Metamorphosis effect; hidden levelling system where a point of ATT is gained for every (current ATTx2 +11) blood heals while Muramasa is equipped